Headphone



FIG. 1 is a perspective view of a headphone;

FIG. 2 is a front elevational view of a headphone;

FIG. 3 is a rear elevational view of a headphone;

FIG. 4 is a left side elevational view of a headphone;

FIG. 5 is a right side elevational view of a headphone;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof;

FIG. 8 is a view from the direction of Arrow 8 in FIG. 2 of a headphone; and,

FIG. 9 is a view from the direction of Arrow 9 in FIG. 2 of a headphone. 

We claim the ornamental design for a headphone, as shown and described. 